25254155555 has 4 divisors (see below), whose sum is σ = 30304986672. Its totient is φ = 20203324440.

The previous prime is 25254155519. The next prime is 25254155557. The reversal of 25254155555 is 55555145252.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25254155555 - 2²⁶ = 25187046691 is a prime.

It is a super-2 number, since 2×25254155555² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25254155557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525415551 + ... + 2525415560.

It is an arithmetic number, because the mean of its divisors is an integer number (7576246668).

Almost surely, 2^25254155555 is an apocalyptic number.

25254155555 is a deficient number, since it is larger than the sum of its proper divisors (5050831117).

25254155555 is an equidigital number, since it uses as much as digits as its factorization.

25254155555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050831116.

The product of its digits is 1250000, while the sum is 44.

The spelling of 25254155555 in words is "twenty-five billion, two hundred fifty-four million, one hundred fifty-five thousand, five hundred fifty-five".